// 联合定义
/*
p1 = 8
p2 = 4
*/
#include <stdio.h>

int main(int argc, char **argv)
{
    int *p1, p2;

    printf("p1 = %lu\n", sizeof(p1));
    printf("p2 = %lu\n", sizeof(p2));

    return 0;
}